For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningEngine Coolant
The cooling system in the vehicle is filled with DEX-COOL engine coolant. This
coolant is designed to remain in the vehicle for 5 years or 240 000 km (150,000
mi), whichever occurs first.
The following explains the cooling system and how to check and add coolant when
it is low. If there is a ...
Windshield Washer Nozzle Hose Replacement
Preliminary Procedure
Remove the hood insulator. Refer to
Hood Insulator Replacement.
Place a clean container under the front driver side near where the
windshield washer nozzle and windshield washer pump
hose will be disconnected.
Recover all lost windshield washer solven ...
Rear Spring Insulator Replacement
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and Jacking the
Vehicle.
Support the rear axle with a tall jack stand near the shock absorber.
Remove the lower shock bolt. Refer to Shock Absorber Replacement.
Using the tall jack stands, slowly lower the rear a ...